Volume weight detection device for flexible porous material

Abstract

The utility model relates to the technical field of material volume weight detection devices, and particularly discloses a flexible porous material volume weight detection device, which comprises a bearing part for placing a material to be detected; wherein in the length direction of the to-be-detected material, the plurality of bearing parts are arranged below the to-be-detected material at fixed intervals; the load detection part is used for detecting the load change of the bearing part; by using the device, the volume weight of the to-be-detected material can be quickly and simply detected, the to-be-detected material cannot be damaged, the volume weight of each product on a production line can be detected, and the quality control of the products can be effectively improved; besides, a terahertz wave detector does not need to be used, the overall cost of the detection device can be effectively reduced, the thickness of the to-be-detected material is not limited, and volume weight detection can be effectively carried out on the to-be-detected materials with different thicknesses.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of material's volume weight detection device, especially to a kind of flexible porous material volume weight detection device. BACKGROUND

[0002] In the production process of the material of some products (such as polyurethane material, latex material), the volume weight of flexible porous material needs to be measured, and the pore forming condition of flexible material is reflected by the volume weight of flexible porous material, so as to determine whether flexible porous material meets production requirements.

[0003] The existing detection methods include:

[0004] Method one, drainage method, the volume weight is measured by the weight difference between the material to be detected and dry weight after absorbing water;

[0005] Method two, terahertz wave detector detection method, the layering, pore and inclusion of the material to be detected are directly detected by terahertz wave nondestructive testing.

[0006] However, for method one, it is destructive test, cannot detect the product on each production line, is not conducive to product control, and the detection time is long;

[0007] For method two, terahertz wave detector is complex and precise, and the cost is high, and the recognition thickness of terahertz wave detector is limited, which can only recognize the thickness of about 6mm material, and the detection range is limited. INVENTION CONTENTS

[0008] In view of the above problems, the utility model provides a kind of flexible porous material volume weight detection device, which aims to improve the volume weight detection efficiency of material and reduce the volume weight detection cost.

[0009] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0010] A kind of flexible porous material volume weight detection device is provided, comprising: bearing component, for placing the material to be detected;Wherein, along the length direction of the material to be detected, several bearing components are arranged at intervals with fixed distance below the material to be detected;Load detection component is used to detect the load change of bearing component.

[0011] Further, the bearing component includes: a first lever and a second lever installed in parallel, the first lever is placed below the second lever, and the second lever is used to bear the material to be detected;Second support is installed at both ends of the second lever, and the second support is placed on the first lever;First support is installed at both ends of the first lever;Wherein, the two second supports on one first lever are symmetrically arranged;Load detection component is arranged below the first support.

[0012] Further, the secondary support is fixedly installed on the primary lever, the secondary lever is hingedly installed on the secondary support, and the primary lever is hingedly installed on the primary support.

[0013] Further, the load detection component is a pressure sensor.

[0014] Further, the device further comprises a sliding rail installed along the length direction of the material to be detected, and the plurality of bearing components are slidably installed on the sliding rail.

[0015] Further, the device further comprises a flexible pad laid between the bearing component and the material to be detected.

[0016] The application has the advantages that: the bulk density of the material to be detected can be quickly and simply measured without damaging the material to be detected, the bulk density of each product on the production line can be detected, and the product quality control can be improved; in addition, the terahertz wave detector is not required, the overall cost of the detection device can be effectively reduced, the thickness of the material to be detected is not limited, and the bulk density of the material to be detected with different thicknesses can be effectively detected. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The application provides a bulk density detection device.

[0018] Figure 2 The application provides a bulk density detection device.

[0019] Figure 3 The application provides a bulk density detection device.

[0020] 1, the material to be detected; 2, the load detection component; 31, the primary support; 32, the secondary support; 41, the primary lever; 42, the secondary lever; 5, the sliding rail; and 6, the flexible pad. DETAILED DESCRIPTION

[0021] In order to better understand the above technical solutions, the above technical solutions will be described in detail in combination with the drawings and specific embodiments of the specification.

[0022] Embodiment 1

[0023] Referring to Figure 1 and Figure 2 The application discloses a bulk density detection device for flexible porous materials, which comprises a bearing component for placing the material to be detected 1, wherein a plurality of bearing components are arranged at intervals with a fixed distance below the material to be detected 1 along the length direction of the material to be detected 1; and a load detection component 2 for detecting the load change of the bearing component.

[0024] In the utility model, along the length direction of the material to be detected 1, the material to be detected 1 is divided into several sections, and the several bearing components are respectively below each section of the material to be detected 1, the gravity value of each section of the material to be detected 1 is measured by the load detection component 2, and the bulk density of each section of the material to be detected 1 can be calculated, so that whether the whole material to be detected 1 meets the production demand can be evaluated.

[0025] By using the utility model, the bulk density of the material to be detected 1 can be measured quickly and simply, the material to be detected 1 is not damaged, the bulk density of each product on the production line can be detected, and the product quality control can be improved effectively; in addition, the utility model does not need to use a terahertz wave detector, the overall cost of the detection device can be effectively reduced, and the thickness of the material to be detected 1 is not limited, and the bulk density of the material to be detected 1 of different thicknesses can be effectively detected.

[0026] Specifically, the bearing component comprises: a first lever 41 and a second lever 42 installed in parallel, the first lever 41 is arranged below the second lever 42, and the second lever 42 is used for bearing the material to be detected 1; a second support 32 is installed at both ends of the second lever 42, and the second support 32 is arranged on the first lever 41; a first support 31 is installed at both ends of the first lever 41; wherein the two second supports 32 on one first lever 41 are symmetrically arranged; and the load detection component 2 is arranged below the first support 31.

[0027] Preferably, the second support 32 is fixedly installed on the first lever 41, the second lever 42 is hingedly installed on the second support 32, and the first lever 41 is hingedly installed on the first support 31.

[0028] Preferably, the load detection component 2 is a pressure sensor, and one pressure sensor is arranged at each end of one first lever 41.

[0029] Specifically, the material to be detected 1 is borne by the second lever 42, the gravity of the material to be detected 1 is evenly distributed on the two second supports 32, and is evenly transmitted to the two first supports 31 through the first lever 41, so that the accuracy of data in the whole detection process is guaranteed; one pressure sensor is arranged at each end of the first lever 41.

[0030] The load change of the bearing component can be obtained by detecting the numerical change of the pressure sensor before and after the material to be detected 1 is placed.

[0031] In the utility model, the second support and the first support are arranged, and the two-stage support detection can release the size limitation on the volume of the material to be measured.

[0032] In one aspect, the deformation of the primary lever 41 (e.g. the uneven bottom of the pressure sensor) can be avoided, which can affect the accuracy of the pressure measurement of the secondary support.

[0033] On the other hand, it is more convenient to use, and the specifications of the secondary lever 42 and the secondary support can be flexibly changed to meet the measurement requirements of different quality and size of the material to be detected.

[0034] It can be understood that the bulk density γ of each section of the object is 2F / V, where γ is the bulk density of the section of the material to be detected 1, F is the load change detected by the pressure sensor of the section of the material to be detected 1, and V is the volume of the section of the material to be detected 1.

[0035] Specifically, the device further comprises a sliding rail 5 installed along the length direction of the material to be detected 1, and a plurality of bearing components are slidably installed on the sliding rail 5.

[0036] In some embodiments, the sliding rail 5 can be an I-shaped rail, and a sliding seat is slidably arranged on the I-shaped rail, and the pressure sensor is arranged on the sliding seat, and the primary support 31 is arranged above the pressure sensor.

[0037] It is worth mentioning that by moving the bearing component on the sliding rail 5, the section spacing between each section of the material to be detected 1 can be infinitely refined, thereby realizing full cross-section measurement of the material to be detected 1, and the measurement accuracy can be flexibly improved according to different production requirements.

[0038] Preferably, the device further comprises a flexible pad 6 laid between the bearing component and the material to be detected 1.

[0039] It is worth mentioning that for flexible porous materials such as polyurethane materials or latex materials, the material to be detected 1 can be placed on the bearing component by a support, and the bulk density detection work can be performed to reflect the pore forming condition of the porous flexible material.

[0040] In addition, for concrete materials, a flexible pad 6 can be laid above the bearing component, and the concrete material is placed on the flexible pad 6, and the gravity of the concrete material is uniformly distributed on each bearing component through the flexible pad 6, so as to realize the detection of the bulk density of the concrete material.

[0041] It is worth mentioning that the flexible pad 6 can be a measuring soft pad.

[0042] Preferably, the measuring soft pad is composed of two layers of materials, the bottom of the measuring soft pad is a force transmission structure support, which can be a lever or a hard pad plate, and a soft rubber is arranged on the upper part of the measuring soft pad, so that the concrete material can uniformly transmit force to the hard pad plate / lever, and then the force is transmitted to the secondary lever 42, thereby measuring the weight.

[0043] Preferably, the bottom of the soft leather pad is a hot-dip galvanized thin steel plate, and the upper part is a fixed-thickness silica gel. The bottom of the hot-dip galvanized thin steel plate serves as a mold bottom plate on the silica gel forming, and plays a force transmission role in structure, thereby ensuring that the high-hardness material to be detected (for example, concrete) uniformly transmits force to each bearing part.

[0044] Embodiment 2

[0045] Referring to Figure 3 In this embodiment, a method for detecting the bulk density of a flexible porous material is also provided, which comprises the following steps: S1. dividing the material to be detected 1 into n segments; S2. determining the spacing between two adjacent bearing parts 2; S3. selecting the specification of the load detection part 2; S4. obtaining the density of each segment of the material to be detected 1 ρ1-ρn; and S5. evaluating whether the production process needs to be optimized according to the density of each segment of the material to be detected 1. n

[0046] Further, whether the production process needs to be optimized is evaluated according to the mean value and sample variance of the densities of the n segments of the material to be detected 1.

[0047] Further, m materials to be detected 1 are taken, and steps S1-S4 are repeated for each material to be detected 1. Whether the production process needs to be optimized is evaluated according to the skewness of the densities of the m materials to be detected 1 by using a distribution form evaluation method.

[0048] The mean value calculation formula of the density of each material to be detected 1 divided into n segments is:

[0049]

[0050] wherein, is the mean value of the density of each material to be detected 1, ρ1-ρn is the density of each segment of the material to be detected 1, and n is the number of segments of each material to be detected 1. i

[0051] The sample variance calculation formula of the density of each material to be detected 1 divided into n segments is:

[0052]

[0053] wherein, 2 is the sample variance of the density of the n segments of the material to be detected 1, ρ1-ρn is the density of each segment of the material to be detected 1, and n is the number of segments of each material to be detected 1. i is the mean value of the density of each material to be detected 1, ρ1-ρn is the density of each segment of the material to be detected 1, and n is the number of segments of each material to be detected 1.

[0054] The population mean calculation formula of the densities of the m materials to be detected 1 is:

[0055]

[0056] ​​​Wherein, μ is the overall mean of the density of the m materials to be detected 1; is the mean density of each material to be detected 1; μ is the overall mean of the density of the m materials to be detected 1; and m is the number of the materials to be detected 1.

[0057] The formula for calculating the overall standard deviation of the density of the m materials to be detected 1 is:

[0058]

[0059] Wherein, σ is the overall standard deviation of the density of the m materials to be detected 1. is the mean density of each material to be detected 1; μ is the overall mean of the density of the m materials to be detected 1; and m is the number of the materials to be detected 1.

[0060] The formula for calculating the skewness of the density of the m materials to be detected 1 is:

[0061]

[0062] Wherein, m is the number of each material to be detected, is the mean density of each material to be detected 1; μ is the overall mean of the density of the m materials to be detected 1; and σ is the overall standard deviation of the density of the m materials to be detected 1.

[0063] It is worth mentioning that in actual production, the theoretical design density and its tolerance range of the material to be detected 1 can be specified in advance according to the process technology and existing product data.

[0064] In the present application, whether the mean density of the material to be detected 1 falls within the theoretical range is judged, and the fluctuation of the sample variance is considered, so as to judge whether the single product is qualified.

[0065] It is worth mentioning that in actual production, the theoretical skewness and its tolerance range of the material to be detected 1 can be specified in advance according to the process technology and existing product data.

[0066] Wherein, when the actual skewness is closer to 0, it indicates that the actual skewness is closer to the theoretical skewness; the larger the absolute value of the actual skewness, the farther the actual skewness is from the theoretical skewness.

[0067] In the present application, whether the skewness of the material to be detected 1 falls within the theoretical range is judged, so as to judge whether there is a systematic deviation in the production process, to judge the uniformity of the products on the production line as a whole, and to judge whether the products on the production line as a whole meet the production requirements; when the skewness does not fall within the theoretical tolerance, it indicates that there are extreme values in the data; it is necessary to check whether the equipment and steps involved in the production process meet the production regulations; and different steps and equipment can be accurately verified.

[0068] Example 3

[0069] In the embodiment, the material to be detected 1 is a foamed material, and the bulk density of the foamed material is measured to evaluate the uniformity of the foamed material.

[0070] In the embodiment, the foamed material is latex.

[0071] Preferably, two pieces of latex with the size of 2mx2mx0.2m are taken for measurement, five bearing parts are arranged below each piece of latex, and the two pieces of latex are coded as test piece 1 and test piece 2.

[0072]

[0073] In the embodiment, the latex is obtained by physical foaming technology, and the obtained latex material is greater than 100kg / m 3 , and the density is large, the hardness is high, and the density variance of the test piece 1 is large, so it can be known that the uniformity of the test piece 1 is poor, and the production process is regulated to recommend the latex density to be between 75-85kg / m 3 , so it is necessary to improve and optimize the physical foaming technology.

[0074] Therefore, by using the method provided by the utility model, the bulk density of the material to be detected on the production line can be quickly and accurately detected, a theoretical basis can be provided for the optimization of the production process, and the product quality control quality on the production line can be effectively improved.

[0075] Those skilled in the art will appreciate that although preferred embodiments of the utility model have been described, once the basic creative concept is known, those skilled in the art can make further changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the utility model. Obviously, those skilled in the art can make various modifications and changes to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and changes of the utility model fall within the scope of the utility model claims, the utility model also intends to include these modifications and changes.

Claims

1. A flexible porous material bulk density detection device, characterized by, The application relates to a material load detection device. The device comprises: a bearing part for placing a material (1) to be detected; a plurality of bearing parts are arranged below the material (1) to be detected at intervals along the length direction of the material (1) to be detected; 2. The flexible porous material bulk density detection apparatus of claim 1, wherein, a load detection part (2) for detecting the load change of the bearing part. The bearing part comprises: a primary rod (41) and a secondary rod (42) arranged in parallel, the primary rod (41) is arranged below the secondary rod (42), and the secondary rod (42) is used for bearing the material (1) to be detected; a secondary support (32) arranged at the two ends of the secondary rod (42), and the secondary support (32) is arranged on the primary rod (41); 3. The flexible porous material bulk density detection apparatus of claim 2, wherein, a primary support (31) arranged at the two ends of the primary rod (41); wherein the two secondary supports (32) on one primary rod (41) are symmetrically arranged; and the load detection part (2) is arranged below the primary support (31).

4. The flexible porous material bulk density detection apparatus of claim 1, wherein, The secondary support (32) is fixedly arranged on the primary rod (41), the secondary rod (42) is hingedly arranged on the secondary support (32), and the primary rod (41) is hingedly arranged on the primary support.

5. The flexible porous material bulk density detection apparatus of claim 1, wherein, The load detection part (2) is a pressure sensor.

6. The flexible porous material bulk density detection apparatus of claim 1, wherein, The device further comprises a sliding rail (5) arranged along the length direction of the material (1) to be detected; wherein a plurality of bearing parts are slidably arranged on the sliding rail (5). The device further comprises: a flexible pad (6) arranged between the bearing part and the material (1) to be detected.

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